Piston water-meter



(No Model.)

P. L. 'SYLVESTER.

PISTON WATER METER.

No. 365,323. Patented June 21, 1887-.

UNITED STATES PATENT OFF-ICE.

FRED L. SYLVESTER, OF CHELSEA, MASSACHUSETTS.

PISTON WATER-METER.

$PECIFICATION forming part of Letters Patent No. 365,323, dated June 21, 1887. Application filed Se temhor 13, 1859. Serial No. 213.378. (bio model.)

To all whom it may concern:

'Be it known that I, FRED L. SYLVESTER, a citizen of the United States, and a resident of Chelsea, in the county of Suffolk and State of Massachusetts, have invented a newand useful Improvement in Water-Meters, of which the following, taken in connection with the accompanying drawings, is a specification.

This invention relates to improvements in IQ watermeters; and it consists particularly in the valve'mechanism for the same, and it is carried out as follows, reference being had to the accompanying drawings, where Figure 1 represents a central longitudinal I 5 section of a water-meter provided with my improved valve mechanism, and Fig. 2 represents a plan view of the same. Fig. 3 represents a cross-section on the'line X Y, shown in Fig. 1. Figs. 4 and 5 represent longitudinal sections of modifications of theinvention.

Similar letters refer to similar parts wherever they occur on the different parts of the drawings.

A represents the middle portion of the wa- 2 5 ter-meter shell, and A A represent the bored out cylinders on each side of it, as usual.

a and (1 represent, respectively, the heads for closing up the outer ends of the cylinders 3 5 nel, G, to and passing through the valve-base G, where itterminates as a port, c,and a similar channel, 0', leads from the end of cylinder A to and passing through the said valve-base, where it terminates as a port, 0", as shown in 0 Fig. 1. Midway on the valve-base C is a port,

(1, leading to the main exhaust D, as usual, and d d are ports leading from top of valve-base 0, outside of ports 0 c, to the middle portion, A, of the meter, as is common in reciprocatory piston-meters.

A is the inlet to the'central chamber, A, of the meter, as usual.

b isa bunter in the outer end of piston B, and a similar hunter is arranged in the outer 0 end of iston B to serve as a recaution as 5 usual, in case the reciprocatory pistons should move beyond their proper limits.

To the top of the valve-base O is secured the balancing-cover E, having for this purpose a downwardly-projecting lip or flange, e, the lower edge of which is secured water-tight to the uppersuriace of the valve-base 0. Through the cover E are cored out the passages or channels E and E, leading from the top of said cover to pockets or spaces 6 e in the lower ends of said cover, as shown in Fig. 1. From the top of the cover E leads a port, 6, that communicates with the main exhaust D by means of the auxiliary exhaust-passage e, as shown in Figs. 1 and 3.

Between the under side of the cover E and top ofyalve base G is arranged the reciprocatory main valve F, having ports f and f passing clear through it, as shown in Fig. 1,

with abridge or division,f, between them, saidbridge being equal in width to the width ofthe exhaust-portal, so as to completely cover the latter when the main valve passes from one position to the otherin its reciprocatory movement. The ports f and f are each equal in width to the combined widths of the respective ports 0 d and c d and the bridge separating said respective ports, as shown inFig. 1. The solid ends f and f of the main valve F are each wide enough to prevent at all times communications from the cored-out passages Eand E to the respective ports (1 and d.

Between the upper surface of the cover E supplementary valve H, having in its ends the reduced horizontal rods H and H", which are operated directly by the moving pistons B and B. The supplementary valve H has a port, 71, passing through it, as shown in Figs. 1, 2, and 3, of sufficient width to establish a communication between the exhaust-port e and one of the cored-out passages E E, ac-

cording to the position of saidsupplementary and a stationary top plate, Gr, is located the The and E when said supplementary valve is moved by the respective pistons B B to its limit of stroke in either direction.

The operation of the device is as follows: As the piston B reaches the limit of its stroke in the direction of the arrow shown in Fig. 1, it comes in contact with the rod II on the supplementary valve H and throws the latter over to the position shown in Fig. 1, and in so do ing a portion of the liquid in chamber A is made to pass around the rod H and through the eored-out passage E into the pocket e,and by the pressure of the liquid thus brought to bear on the left end of the main valve F it is moved to the position shown in Fig. 1, by which a communication is established from the central chamber, A, to the rear end of cylinder A, back of piston B, through the ports 11 c in valve-base 0, port f in main valve F, and passage G, causing the piston B" to advance toward the center chamber, A, and the piston 13 to move with it-at the same time as an open communication is established from the rear end of cylinder A, back of piston B, to the main exhaust D by means of the ports 0 d in the valve base 0, port f in the main valve F, and passage 0 at the same time as the liquid in pocket or space 0 and corcdout channel E is allowed to pass to the main exhaust I) through the port It in the supplementary valve H, the exhaust-port c, and passage 0 in the cover F. When the piston B has advanced far enough to throw over the supplementary valve H to its opposite position, a reverse motion of the parts and flow of the liquid in an opposite direction takes place in a corresponding manner. Thus it will be seen that the main valve F is actuated only by the pressure of the liquid in chamber A as controlled by the positively-operated supplementary valve H.

I11 Fig. 4 the modification is simplythis, that the cover G is dispensed with, and instead of a perforated supplementary valve, II, a D-valve is used to effect the same result.

The modification shown in Fig. 5 consists in the substitution for a sliding reciprocatory supplementary valve, as shown in Figs. 1, 2, 3, 4, of a roek-valve, H with a passage, h, leading from chamber A to the valve-chamber H for said valve, the latter having attached to it a forked head, H, that is actuated by collars B B on the piston-rod B to effect the same result.

Having thus fully described the nature, 0011-, struetion, and operation of my invention, I wish to secure by Letters Patent, and claim 1. In a fluid-meter, the combination, with the cylinders A A, reciprocating pistons B B, and chamber A, of the main valve F, hav ing the ports ff, the cover E, having passages E E, leading to pockets 0 c at the ends of main valve F, and. the supplementary valve H, having port It, for conducting the liquid to operate the main valve, and having the rods or projections H H, by which the supplementary valve is thrown over by contact with the pistons B B, as and for the purpose set forth.

2. In a fluid-meter, the combination, with the cylinders A A, reciprocating pistons B B, and chamber A, of asupplementary valve, H, positively operated by the reciprocating pistons, the cover E, having exhaust-passage c, and passages E E", leading to pockets or spaces 0 c, and main valve F, having the ports f f, for automatically conducting the liquid alternately to thecnds of cylinders A A and from them to the main exhaust I), as and for the purpose set forth.

3. In a fluid-meter, the combination, with the cylinders A A, reciprocating pistons B B, and chamber A, of a supplementary valve, H, positively actuated by the pistons or their connections, and a main valve, F, arranged below the supplementary valve H, and ports or channels, as described, for conducting the liquid under pressure from the supplementary valve to the ends of the main valve, and thereby to control and regulate the flow of the liquid to and from the ends of cylinders A A, as herein set forth and described.

4. In a fluid-meter, the automatic valve mechanism, as described, consisting ofthc podtively-actuated supplementary valve H, the

cover E, having exhaust-passage c a, leading to the main exhaust D, and passages E E, leading from its upper surface, respectively, to pockets 0 c at the lower ends of the cover E, the main valve F, having the ports fj' and bridgcf, and the valve-base with its supply-ports d d, delivery-ports c c, and exhaust-port (1, leading to the main exhaust D, as and for the purpose set forth.

5. In a fluid-meter, the stationary cover E, arranged between the main and supplementary valves F H, and having the passages E E and exhaust-channel c 0 arranged in it, as and for the purpose set forth.

In testimony whereof I. have signed my name to this specification, in the presence oftwo subscribing witnesscs, on this 8th day of September, A. D. 1886.

FRED L. SYLVESTER.

Vituesscs:

ALBAN ANDREN, GEORGE M. ELDER. 

